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Mutator.swift
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Mutator.swift
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/// A mutator takes an existing program and mutates it in some way, thus producing a new program.
public protocol Mutator {
/// The name of this mutator.
var name: String { get }
/// Mutates the given program.
///
/// - Parameters:
/// - program: The program to mutate.
/// - fuzzer: The fuzzer context for the mutation.
/// - Returns: The mutated program or nil if the given program could not be mutated.
func mutate(_ program: Program, for fuzzer: Fuzzer) -> Program?
}
// Generic implementation of the name getter for Mutators
extension Mutator {
public var name: String {
return String(describing: type(of: self))
}
}